The bloodied pigs head is believed to have been thrown at the mosque from the window of a moving car

The bloodied pig’s head is understood to have been “thrown” at the mosque from the “window of a moving car” at around 9pm, Jérôme Cordier, the mayor Saint-Valérien said.

Mr Cordier denounced the “thoughtless, ignorant act” and said that the alleged attacker was most probably “a simpleton and/or an outsider”.

Pigs are considered unclean in Islam and their presence in or near mosques is taken as an insult.

Mohammed Arakik, vice-president of a local Muslim association, also condemned the attack on the new mosque and said that he was “deeply shocked” by the incident.

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Pigs are considered unclean in Islam and their presence in or near mosques is foreseen as an insult

Mr Arakik said mosque officials had decided to file a complaint against persons unknown in a bid to find the attacker, before adding that the anti-Muslim attack had left local worshippers “fearing for their safety”.

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The pig's head was thrown at a Mosque in a 'tranquil town' in Northern France

He said: “People are afraid. The mosque has been vandalised with anti-Islam slogans in the past, but whoever did this has taken things one step too far. We live in a tranquil town devoid of hate and crime; locals are tolerant and open-minded. Things like this are not meant to happen here.”

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Local police officials have launched an inquiry to find the mosque attack suspect

The mosque – a converted prayer hall located in the basement of a council estate – will be able to welcome up to 80 worshippers and is due to open its doors in the next few weeks.